50mm Blue Ceramic Airstone Ball Hi Oxygen Air Stone For Koi Pond Aquarium Tank
Oxygen is essential for promoting pond life. These air stones are also ideal for promoting the action of aerobic bacteria in the filter zone of your pond. 𝗦𝗨𝗙𝗙𝗜𝗖𝗜𝗘𝗡𝗧 𝗔𝗜𝗥 𝗙𝗟𝗢𝗪: Provides maximum aeration to your pond.